A doped semiconductor has impurity levels 0.01eV above the valence band.
Find the maximum wavelength of light which can create a hole in the valence band.

Explanation

Also, `E_(g)= (hc)/(lamda)`
`rArr lamda= (hc)/(E_(g))= (6.63 xx 10^(-34) xx 3 xx 10^(8))/(1.6 xx 10^(-19))`
`=1.24 xx 10^(-6)m`